diff --git a/libvips/colour/im_rad2float.c b/libvips/colour/im_rad2float.c
index 8adc8065..f63be113 100644
--- a/libvips/colour/im_rad2float.c
+++ b/libvips/colour/im_rad2float.c
@@ -180,7 +180,7 @@ rad2float( COLR *inp, COLOR *outbuf, int n )
 int
 im_rad2float( IMAGE *in, IMAGE *out )
 {
-	if( vips_check_coding_rad( "rad2float", in ) ||
+	if( vips_check_coding_rad( "argb2rgba", in ) ||
 		im_cp_desc( out, in ) )
 		return( -1 );
 	out->Bands = 3;
diff --git a/libvips/include/vips/vips7compat.h b/libvips/include/vips/vips7compat.h
index facf011b..a661710e 100644
--- a/libvips/include/vips/vips7compat.h
+++ b/libvips/include/vips/vips7compat.h
@@ -64,7 +64,6 @@ extern "C" {
 #define IM_CODING_NONE VIPS_CODING_NONE
 #define IM_CODING_LABQ VIPS_CODING_LABQ
 #define IM_CODING_RAD VIPS_CODING_RAD
-#define IM_CODING_ARGB VIPS_CODING_ARGB
 
 #define IM_TYPE_MULTIBAND VIPS_INTERPRETATION_MULTIBAND
 #define IM_TYPE_B_W VIPS_INTERPRETATION_B_W